Commutator accessory



NOV. 11, 1930. I w MATAYA 1,781,551

COMMUTATOR ACCES SORY Filed Feb. 15', 1928 ATTORNEY Patented Nov. 11,1930 UNITED STATES PATENT OFFICE COMMUTATOR ACCESSORY Application filedFebruary 15, 1928. Serial No. 254,547.

This invention is directed to an improvement in commutator cleaners andconsists generally in means for wiping a commutator in order to preventthe accumulation of material tending to interfere with the brushcontact.

The primary object of the invention is the provision of means in theform of a cleaner carried by the brush ring or frame and which isindependently adjustable therein to compensate for wear and to insurethe proper cleaning function.

The invention is illustrated in the accompanying drawings, in which:

Figure 1 is a view in elevation, partly in section, illustrating theapplication of the improvement.

Figure 2 is a transverse section of the cleaning element and itsmounting.

Figure 3 is a similar section taken at right angles to that of Figure 2.

For the purpose of illustration, the improvement is shown as applied toa conventional machine wherein 1 indicates the commutator, 2 the fieldwindings, 3 the rings, 4: the usual casting for supporting the brushesand which is part of the frame 5 and 6 the rod supported on the castinga and carrying through a suitable mounting the usual brushes 8 andconducting wires 7.

The improved cleaner is mounted upon a shaft 9 which is rotatablysupported in the casting 4L and which beyond the casting isdiametrically perforated to receive a stem 10 I held in adjustedposition diametrically of the shaft 9 by lock nuts 12. The stem 10 isinsulated by insulating strips 11 and an insulating lining 13 in theopening in the shaft 9.

Carried by the lower end of the stem 10 is a holder 14 comprising ahollow sheet metal.

box-like construction open at the lower end to receive the cleaningelement shown in the form of bristles 15 which may, if desired, be ofany appropriate character.

The lower free edges of the holder 14 are slightly inturned, and a screw16 is passed through the opposing walls and appropriately threaded inone or the other to insure a therefore these brushes do not serve as arule to maintain the commutator clean, particularly beyond the area withwhich the brushes contact. There is, therefore, a tendency for theaccumulation of dust and dirt upon this free portion of the commutatorwhich, if permitted to accumulate, will reach the brush area andinterfere with the connection.

The cleaning element 15 is of a width to include this portion of thecommutator not reached by the usual commutator brushes and serves toinsure a wiping cooperation with such commutator throughout practicallyits full width to thereby maintain the same clean under all conditions.Obviously, the cleaner 15 may be adjusted relatively to the com- Fmutator through adjusting the stem 10 by the lock nuts 12, andfurthermore the shaft 9 may be rotated at will to insure a properbearing of the cleaning element upon the commutator.

What is claimed to be new is:

1. In combination with a commutator and a brush holding castingcooperating there with, of a cleaning element to cooperate with thecommutator and including a shaft rotatably mounted in said casting, aholder adj ustable diametrically of the shaft, and a series of bristleelements secured in the holder.

2. In a dynamo electric machine having a commutator and a brush holdersupport, the combination of a shaft rotatably mounted in said support, astem carried by the shaft, the said stem being vertically adjustablewith relation to the shaft, and a brush carried on the end of the stem,the said brush contacting with the face of the commutator and therebycleaning the same.

In testimony whereof I afiiX my signature.

TVILLIAM MATAYA.

